Fresh and hardened state of fibre concrete

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26232511%3A_____%2F17%3AN0000023" target="_blank" >RIV/26232511:_____/17:N0000023 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Fresh and hardened state of fibre concrete

Popis výsledku v původním jazyce

The aim of research works was to find suitable homogenization techniques, design of mixing process and optimal dosing of individual components. By means of these actions it is possible to achieve the best dispersion of selected fibre types, both metal and non-metal, in fine-grained cementitious matrixes, which is subsequently verified in hardened composites at first by non-destructive and then by destructive methods. The Research Institute for Building Materials designed new experimental devices for the Discovery Hybrid Rheometer (DHR-1) to measure rheological properties of fresh cement-based mixtures. They are three-blade and three-ball agitators with a complementary role for absolute measurements using a system of coaxial cylinders. For slurries with low viscosity blade agitators are used and for higher viscosity suspensions ball agitators or a board-to-board system with roughened surface may be used. In order to measure highly heterogeneous suspensions, such as cement paste and mortar, a helical rotor was designed and manufactured. The advantage of its use is that during measurements the material is carried by the rotor and heavier particles do not settle which avoids slippage like when coaxial cylinders or bladed rotors are used.

Název v anglickém jazyce

Fresh and hardened state of fibre concrete

Popis výsledku anglicky

The aim of research works was to find suitable homogenization techniques, design of mixing process and optimal dosing of individual components. By means of these actions it is possible to achieve the best dispersion of selected fibre types, both metal and non-metal, in fine-grained cementitious matrixes, which is subsequently verified in hardened composites at first by non-destructive and then by destructive methods. The Research Institute for Building Materials designed new experimental devices for the Discovery Hybrid Rheometer (DHR-1) to measure rheological properties of fresh cement-based mixtures. They are three-blade and three-ball agitators with a complementary role for absolute measurements using a system of coaxial cylinders. For slurries with low viscosity blade agitators are used and for higher viscosity suspensions ball agitators or a board-to-board system with roughened surface may be used. In order to measure highly heterogeneous suspensions, such as cement paste and mortar, a helical rotor was designed and manufactured. The advantage of its use is that during measurements the material is carried by the rotor and heavier particles do not settle which avoids slippage like when coaxial cylinders or bladed rotors are used.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20500 - Materials engineering

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

The 12th Central European Congress on Concrete Engineering Innovative materials and technologies for concrete structures

ISBN

978-963-12-9651-8

ISSN

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e-ISSN

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Počet stran výsledku

8

Strana od-do

171-178

Název nakladatele

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Místo vydání

Budapest

Místo konání akce

Tokaj

Datum konání akce

1. 9. 2017

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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